Poa secunda ssp. ampla (Big bluegrass)

Formerly known as Poa ampla. Cool season, perennial bunch grass with shallow, fibrous root system, sometimes spreading by short rhizomes. Occurs on a variety of sites but is intolerant of poorly drained soils or high water tables. Begins growth in late summer to early fall and stays green later than other species. Resumes growth in very early spring and ripens in early to late summer depending on available moisture. Excellent palatability to livestock and wildlife year-round. Seeds valued by birds and small mammals.

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Family: Poaceae

Duration: Perennial

Growth Habit: Graminoid

Native Status: Native

Season: Cool

Growth Form: Bunchgrass

Mature Height: 16 in.

Annual Precipitation: 8-16 in.

Drought Tolerance: High

Shade Tolerance: Intolerant


Wetland Indicator Status: FACU

Fire Resistance: No

Fire Tolerance: Medium


Coarse Texture: Yes

Medium Texture: Yes

Fine Texture: No

Salinity Tolerance: Low

CaCO3 Tolerance: Medium

pH Range: 6.0-8.0


Seeds per Pound: 1,046,900

Seeding Rate: 2-4 PLS lbs/acre

Season: Spring/Fall

Days to Germination:


Sherman - Begins spring growth and matures very early. It generally grows 3 ft. tall, producing abundant forage that is blue-green in color. Useful for all conservation plantings in the Pacific Northwest, ID, NV, and northern CA. (Released 1945, source of ecotype: Sherman County, OR)